Measurement of the water exchange rate of bound water in the manganese(II)-adenosine triphosphate complex by oxygen-17 nuclear magnetic resonance

Biochemistry ◽  
1973 ◽  
Vol 12 (4) ◽  
pp. 778-782 ◽  
Author(s):  
Mark S. Zetter ◽  
Harold W. Dodgen ◽  
John P. Hunt
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Exchange Rate ◽  
Magnetic Resonance ◽  
Adenosine Triphosphate ◽  
Water Exchange ◽  
Bound Water ◽  
Water Exchange Rate ◽  
Nuclear Magnetic

Water migration in poplar wood during microwave drying studied by time domain nuclear magnetic resonance (TD-NMR)

Holzforschung ◽  
2017 ◽  
Vol 71 (11) ◽  
pp. 881-887 ◽  
Author(s):  
Xinyu Li ◽  
Yulei Gao ◽  
Minghui Zhang ◽  
Ximing Wang ◽  
Xinyue Wei
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Time Domain ◽  
Bound Water ◽  
Free Water ◽  
Microwave Drying ◽  
Drying Rate ◽  
Drying Time ◽  
The Time Domain ◽  
Nuclear Magnetic

AbstractThe migration of bound water and free water has been investigated during microwave drying of wood by the time domain nuclear magnetic resonance (TD-NMR) technique. Both the heartwood (hW) and sapwood (sW) of Beijing poplar (Populus beijingensisW. Y. Hsu) and Qingpi poplar (Populus platyphyllaT. Y. Sun) were studied. The microwave drying is characterized by a fast drying rate, and there is a linear relation between moisture content (MC) and microwave drying time (t). The drying rate of free water is about 2.7 times more rapid than that of bound water. The spin-spin relaxation time (T2) revealed that most of the water was free water situated in smaller pores. The irregular T2 signal amplitudes of free water in hWs indicated that fractional water in smaller pores was transferred into bigger pores during drying.

Water exchange between intra and extracellular compartments studied by nuclear magnetic resonance relaxometry and optical microscopy

2019 ◽  
Vol 53 (8) ◽  
pp. 085401
Author(s):  
Leonardo Brizi ◽  
Enrico Giampieri ◽  
Paola Fantazzini ◽  
Gastone Castellani ◽  
Daniel Remondini ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Optical Microscopy ◽  
Water Exchange ◽  
Nuclear Magnetic Resonance Relaxometry ◽  
Nuclear Magnetic
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